High-gain forward-flyback laminated boost converter

Abstract

The invention relates to a high-gain forward-flyback laminated boost converter which comprises an input voltage source Vin, a power switch tube S, a diode D1, a diode D2, a diode D3, an output capacitor C1, an output capacitor C2, an output capacitor C3, a load R and a transformer, and is characterized in that the transformer is additionally provided with a third winding; the converter adopts the idea of lamination and energy leakage, the input voltage source is divided into two paths of input, one path of input is input to the forward-flyback converter for energy output, and the other path of input is used for energy output through the third winding. Due to the existence of the third winding, the input voltage can be connected in series with the voltage induced by the third winding in the forward direction and then connected in series with the output capacitor of the forward-flyback converter to supply power to the load, so that the converter has higher gain.

Description

Technical field [0001] The present invention relates to the field of power electronic circuit DC converters, and more particularly to a high gain positive antitocking layer boost converter, which can output the input DC low voltage to DC high pressure, and can achieve high gain Guaranteed high efficiency, input current continuous characteristics. Background technique [0002] Procedure of the prior art: [0003] Boost converters are often used for non-sub-boost converters for ordinary boost applications, such as figure 1 Indicated. Where V in Indicates the direct source input, L is inductance, S is the power switch tube, D is the diode, C is the output capacitor, and R is load. The important waveform of the BOOST converter is like figure 2 Indicated. The Boost operation mode in the continuous mode of inductive current is as follows. [0004] Modal analysis [0005] Stage one (T 0 -t 1 : The power switch pipe S is turned on, the voltage L is equal to the input voltage, according t...

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Problems solved by technology

[0013] 2) The conduction time of the switch tube is long, which increases the conduction loss;

[0014] 3) The output diode conduction time is short, the current is large, and the reverse recovery time is long

[0025] 1) The input current is discontinuous;

[0026] 2) The switched capacitor current has a current peak when the switch tube is turned off, which makes the corresponding output capacitor C 3 There is a spike in the current on the circuit, which increases the volume of the output capacitor;

[0027] 3) The switching capacitor as an energy buffer circuit reduces the overall efficiency of the converter

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